Mice in July !

I had good success with mint based wasp spray ('poison free' brand).

Used once and the mice left for a few nights. They came back, I sprayed the undercarriage again, and the mice gave up and left for good.

Prior to this I tried mothballs, but they had no effect.

Side benefit: The wasp spray works on wasps, too. More effective than Raid.

I ordered 2 boxes (8 pouches) of Cab Fresh this morning. I figure 2 in the RV, one in the wagon, and the balance in my shed and garage. I'll report back with results!

As an aside, I was seeing deer ticks really early in the season (March). Turns out that mice carry the ticks and spread them to other animals. I bought some "tick tubes" which are basically toilet paper rolls stuffed with cotton that has a poison on it. Animals aren't affected by it, but it kills ticks. Mice grab the cotton from the tubes, make nests with it and get the poison on their fur. Ticks die when they come in contact with the mice. I've found a couple of nests on the property made out of those cotton balls and I have not seen a single deer tick since March.

I have had mice off and on for a couple of years and usually using a tray of the green pellets works wonders. However, I went to buy some this year and find out that they aren't being sold anywhere as they were considered dangerous to little kids and pets. Bummer as I never used them where there are any kids or pets. I have used several of the replacement mouse proofers to no avail. Wer had something get into the basement and into the basement ceiling. Never saw it, but knew it was there by the fact that it would chew into several packages of food. None of the baits worked so I finally spent $40 bucks on one of those zapper traps, put peanut butter in it and it disappeared. Now, I've got one in the motorhome that has been working on the drivers seat and I've figgered out that it may be living under the floor, but can't find where it's getting into the interior. To get to the seat it's had to go past four bait traps and they have shown no signs of being touched. I put the peanutbutter loaded zapper in there and we'll see what happens. I may have to stuff it with foam rubber as an additional bait.
Oh, and it hasn't touched any food inside the MH, even some nuts that the DW left on the counter after getting home from the last trip.

Jim, what I used is electronic rodent noise devices. I went to a factory in downtown Seattle that makes fortune cookies and it was the only thing that they used, that worked to keep rodents out of there building. I bought two large ones and have them on in both both ends of my coach. I then went to Lowes, and bought a case of #00 course steel wool. I removed every drawer in the coach and put steel wool in run ways and any nook and cranny that I could find. No more rodents. At home, last week, rodents got into my heat pump of my stick built house. I put #00 course steel wool everywhere leading into heat pump! No more rodents in there since then.

Dryer Sheets.

We have local mice and have had a few camping. I've used both all natural and commercial dryer sheets. Basically just buy a box, shove a sheet in every corner inside, the back of the cabinets, footwells- I even put one outside under my propane fill cover (though not under any hot covers like the water heater). One at the hinge of each back door etc. basically everywhere I can without just throwing them on the floor (one under the corner of the carpet though...)

The only time I've had a mouse since is three years after the first sheets and they had no scent left (d'oh). I replaced and we've been mouse free again for a year.

It's easy, cheap and smells nice if you don't get overpowering fabric softener sheets.

Sorry, don't know the name of it, but we bought those electronic devices that plug into a 110 receptacle. It comes in a pack of 3, so put 2 in coach and one in house. It gives off some kind of signal that repels them. It worked for us. No more mice. I bought it online.

I use Fresh Cab and an electronic repelling device. As others have said, I put the Fresh Cab inside two zip-lock bags and leave the outside bag unzipped.

The electronic device sits outside on the floor.